Final answer:
Anorexia, nausea, and vomiting are among the early signs of digitalis toxicity, which requires careful monitoring due to its potential severity.
Step-by-step explanation:
The most common early symptoms of digitalis toxicity are anorexia, nausea, vomiting, and neurological symptoms such as confusion, weakness, and visual disturbances like blurred vision or seeing halos. Digitalis toxicity may also present with cardiac symptoms like arrhythmias. It is vital for individuals taking digitalis, also known as digoxin, to monitor for these symptoms, as early detection is important for managing toxicity. Digitalis is typically used in the treatment of various heart conditions, such as atrial fibrillation, atrial flutter, and sometimes heart failure that cannot be controlled by other medication.